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US 9,751,325 B2Granted
Inkjet printing method and inkjet printer used in the printing method
AssigneeRiso Kagaku Corporation
InventorsKenji Shimomura, Hiroshi Hayashi
Life of this patent
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Abstract
Using a plurality of colors of inks comprising an oil-based ink containing a dye lake pigment and an oil-based ink containing a pigment other than dye lake pigments, and superposing the plurality of colors of inks when printing, the oil-based ink containing a dye lake pigment is ejected on a printing medium prior to the oil-based ink containing a pigment other than dye lake pigments.
Claims10
An inkjet printing method comprising:
- ejecting an oil-based ink (A) containing a dye lake pigment onto a printing medium;
- ejecting an oil-based ink (B) containing a pigment other than dye lake pigments onto the printing medium, and
- ejecting an oil-based ink (B′) containing a pigment other than dye lake pigments onto the printing medium,
- wherein the oil-based ink (A) is ejected onto the printing medium prior to the oil-based ink (B), so that the oil-based ink (B) is disposed on the oil-based ink (A) on the printing medium, and
- wherein the color of the oil-based ink (B) is different from the color of the oil-based ink (B′).
2 more elements
An inkjet printer comprising:
- an inkjet head (a) holding an oil-based ink (A) containing a dye lake pigment,
- an inkjet head (b) holding an oil-based ink (B) containing a pigment other than dye lake pigments, and
- an inkjet head (b′) holding an oil-based ink (B′) containing a pigment other than dye lake pigments,
- a carrying part of carrying the printing medium positioned to face the inkjet head, wherein
- the inkjet head (a) is positioned upstream of the inkjet head (b) in a direction of carrying the printing medium, and
- the color of oil-based ink (B) is different from the color of oil-based ink (B′).
3 more elements
Dependencies are inferred from the claim text.